Bump middleman from 4.5.1 to 4.6.0 in /tech-docs in the minor group (#734)

Bumps the minor group in /tech-docs with 1 update: [middleman](https://github.com/middleman/middleman).


Updates `middleman` from 4.5.1 to 4.6.0
- [Changelog](https://github.com/middleman/middleman/blob/main/CHANGELOG.md)
- [Commits](middleman/middleman@v4.5.1...v4.6.0)

---
updated-dependencies:
- dependency-name: middleman
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tech-docs/Gemfile

@@ -2,4 +2,4 @@ source "https://rubygems.org"
 
 # Include the tech docs gem
 gem 'govuk_tech_docs'
-gem 'middleman', '4.5.1'
+gem 'middleman', '4.6.0'

tech-docs/Gemfile.lock

@@ -1,17 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.8.7)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+    activesupport (8.0.2)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      tzinfo (~> 2.0)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     autoprefixer-rails (10.4.19.0)
       execjs (~> 2)
-    backports (3.25.0)
     base64 (0.2.0)
+    benchmark (0.4.0)
     bigdecimal (3.1.9)
     chronic (0.10.2)
     chunky_png (1.4.0)
@@ -33,13 +41,15 @@ GEM
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
     concurrent-ruby (1.3.4)
-    contracts (0.16.1)
+    connection_pool (2.5.0)
+    contracts (0.17.2)
     csv (3.3.2)
     dotenv (3.1.7)
+    drb (2.2.1)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    erubis (2.7.0)
+    erubi (1.13.1)
     eventmachine (1.2.7)
     execjs (2.10.0)
     fast_blank (1.0.1)
@@ -79,54 +89,55 @@ GEM
       tilt
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
-    hashie (3.6.0)
+    hashie (5.0.0)
     http_parser.rb (0.8.0)
-    i18n (1.6.0)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
     kramdown (2.5.1)
       rexml (>= 3.3.9)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
     memoist (0.16.2)
-    middleman (4.5.1)
-      coffee-script (~> 2.2)
-      haml (>= 4.0.5)
-      kramdown (>= 2.3.0)
-      middleman-cli (= 4.5.1)
-      middleman-core (= 4.5.1)
+    middleman (4.6.0)
+      middleman-cli (= 4.6.0)
+      middleman-core (= 4.6.0)
     middleman-autoprefixer (2.10.0)
       autoprefixer-rails (>= 9.1.4)
       middleman-core (>= 3.3.3)
-    middleman-cli (4.5.1)
+    middleman-cli (4.6.0)
       thor (>= 0.17.0, < 1.3.0)
     middleman-compass (4.0.1)
       compass (>= 1.0.0, < 2.0.0)
       middleman-core (>= 4.0.0)
-    middleman-core (4.5.1)
-      activesupport (>= 6.1, < 7.1)
+    middleman-core (4.6.0)
+      activesupport (>= 6.1)
       addressable (~> 2.4)
-      backports (~> 3.6)
       bundler (~> 2.0)
-      contracts (~> 0.13, < 0.17)
+      coffee-script (~> 2.2)
+      contracts
       dotenv
-      erubis
+      erubi
       execjs (~> 2.0)
       fast_blank
       fastimage (~> 2.0)
+      haml (>= 4.0.5)
       hamster (~> 3.0)
-      hashie (~> 3.4)
-      i18n (~> 1.6.0)
+      hashie (>= 3.4, < 6.0)
+      i18n (>= 1.6, < 1.15)
+      kramdown (~> 2.4)
       listen (~> 3.0)
       memoist (~> 0.14)
       padrino-helpers (~> 0.15.0)
       parallel
-      rack (>= 1.4.5, < 3)
+      rack (>= 3)
+      rackup
       sassc (~> 2.0)
       servolux
-      tilt (~> 2.0.9)
+      tilt (~> 2.2)
       toml
-      uglifier (~> 3.0)
+      uglifier (>= 3, < 5)
       webrick
     middleman-livereload (3.4.7)
       em-websocket (~> 0.5.1)
@@ -142,7 +153,7 @@ GEM
     middleman-syntax (3.4.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    minitest (5.25.4)
+    minitest (5.25.5)
     multi_json (1.15.0)
     mutex_m (0.3.0)
     nokogiri (1.18.3-arm64-darwin)
@@ -160,9 +171,11 @@ GEM
     parslet (2.0.0)
     public_suffix (6.0.1)
     racc (1.8.1)
-    rack (2.2.13)
+    rack (3.1.12)
     rack-livereload (0.3.17)
       rack
+    rackup (2.2.1)
+      rack (>= 3)
     rake (13.2.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
@@ -179,6 +192,7 @@ GEM
       ffi (~> 1.9)
     sassc-embedded (1.78.0)
       sass-embedded (~> 1.78)
+    securerandom (0.4.1)
     servolux (0.13.0)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
@@ -187,13 +201,14 @@ GEM
     terser (1.2.5)
       execjs (>= 0.3.0, < 3)
     thor (1.2.2)
-    tilt (2.0.11)
+    tilt (2.6.0)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uglifier (3.2.0)
+    uglifier (4.2.1)
       execjs (>= 0.3.0, < 3)
+    uri (1.0.3)
     webrick (1.9.1)
 
 PLATFORMS
@@ -202,7 +217,7 @@ PLATFORMS
 
 DEPENDENCIES
   govuk_tech_docs
-  middleman (= 4.5.1)
+  middleman (= 4.6.0)
 
 BUNDLED WITH
    2.3.26